Adam Back
Dr Adam Back is a well known British cryptographer and crypto hacker. He is the inventor of hashcash a denial of service counter measure based on the concept of proof of work done by the sender or client. Hashcash is currently used in a number of..
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Callback verification
Callback verification also known as callout verification is a technique used by SMTP software in order to validate e mail addresses. The most common target of verification is the sender address from the message envelope the address specified duri..
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Challenge-response spam filtering
This article is about e mail. For other uses see Challenge response authentication. A Challenge response or CR system is a type of spam filter that automatically sends a reply with a challenge to the alleged sender of an incoming e mail. In this ..
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DomainKeys
DomainKeys is an e mail authentication system designed to verify the DNS domain of an e mail sender and the message integrity. The DomainKeys specification has adopted aspects of Identified Internet Mail to create an enhanced protocol called Doma..
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Email sender accreditation
sender accreditation is a third party process of verifying email senders and requiring them to adhere to certain accreditee usage guidelines in exchange for being listed in a trusted listing that Internet Service Providers ISPs reference to allow..
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Greylisting
Greylisting sometimes spelled graylisting is a method of defending electronic mail users against e mail spam. A mail transfer agent using greylisting will "temporarily reject" any email from a sender it does not recognize. If the mail is legitima..
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HTML e-mail
HTML e mail is the use of a subset of HTML often ill defined to provide formatting and semantic markup capabilities in e mail that are not available with plain text. Most graphical e mail clients support HTML e mail and many default to it. Many o..
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Joe job
Look up Joe job inWiktionary the free dictionary. Online a joe job is a spam attack using spoofed sender data and aimed at tarnishing the reputation of the apparent sender andor induce the recipients to take action against him see also e mail spo..
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Phishing
An example of a phishing email disguised as an official email from a fictional bank. The sender is attempting to trick the recipient into revealing secure information by "confirming" it at the phisher's website.A Geocities web page duplicating a ..
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Sender ID
sender ID is an anti spoofing proposal from the former MARID IETF working group that joined sender Policy Framework SPF and Caller ID. sender ID is defined primarily in Experimental RFC 4406 but additional parts in RFC 4405 RFC 4407 and RFC 4408...
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Sender Policy Framework
In computing sender Policy Framework SPF is an extension to the Simple Mail Transfer Protocol SMTP. SPF allows software to identify and reject forged addresses in the SMTP MAIL FROM Return Path a typical nuisance in e mail spam. SPF is defined in..
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SHRED
Spam Harassment Reduction via Economic Disincentives SHRED is a proposed sender at risk E mail stamp mechanism for reducing the E mail spamming problem by indirectly increasing the cost of E mail sending to the senders of unwanted E mail. It aims..
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Spam Prevention Early Warning System
The Spam Prevention Early Warning System SPEWS was an anonymous service which maintained a list of IP address ranges belonging to Internet service providers ISPs which host spammers and show little action to prevent their abuse of other network's..
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SpamCop
SpamCop www.SpamCop.net is a free spam reporting service allowing recipients of unsolicited bulk email UBE and unsolicited commercial email UCE to report offenses to the senders' Internet Service Providers ISPs and sometimes their web hosts. Spam..
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Spamtrap
A spamtrap is a honeypot used to collect spam. Spamtraps are usually e mail addresses that are created not for communication but rather to lure spam. In order to prevent legitimate email from being invited the e mail address will typically only b..
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Twitter
Twitter is a free social networking and micro blogging service that allows users to send "updates" or "tweets"; text based posts up to 140 characters long to the Twitter website via short message service instant messaging or a third party applica..
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Whitelist
Look up whitelist inWiktionary the free dictionary.This article is about general whitelists. For for The IMO White List see The White List. A whitelist is a list of accepted items or persons in a set. This list is inclusionary confirming that the..
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